Must pressure vessels be equipped with safety valves?
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We have a system here (with a design pressure of 15 kg/cm2), and this entire system is not equipped with a safety valve. Is it reasonable? Additionally, is it necessary to install a safety valve on pressure vessels? Are there any standards or specifications that specify this clearly?
It is necessary to check whether there are conditions of overpressure; if such conditions exist, a safety valve must be installed. It’s fine if no overpressure condition exists.
If the import and export are interrupted, the system itself has no pressure source, but normal upstream control can ensure that overpressure does not occur.
Could you give a brief introduction to the flowchart? If there is a possibility of overpressure, it must be installed. However, in my opinion, since it is a pressure vessel, there is certainly a possibility of overpressure, so it must be equipped with such a mechanism
It must be set! Otherwise, it does not comply with TSG standards!
There are specific standards for the installation of safety valves, namely \"Installation and Selection of Safety Valves\"; please refer to them.
If it’s not on the container, it can be placed on the pipe. But what the original poster said seems to indicate that it doesn’t exist at all.
If the upstream and downstream connections are severed, overpressure definitely won’t occur. But what if the outlet is sealed while the inlet remains open? If there is a possibility of incorrect operation, then it needs to be set.
Additional information: 1. The normal pressure control in the upstream section works as follows: an exhaust pipe along with a control valve are installed in the outlet pipeline. When the pressure exceeds the set operating value, the exhaust control valve opens automatically to release pressure, keeping the pressure in the outlet pipeline at 10.5–12.0 kg/cm2 (according to the pressure curve, the highest pressure ever reached was 13.7 kg/cm2). Additionally, a safety valve is installed on its outlet pipeline, but its set pressure is 18 kg/cm2. The upstream safety valve is intended to protect the equipment located upstream; since the design pressure of that equipment is also 18 kg/cm2, this safety valve cannot ensure that the pressure entering the system does not exceed 15 kg/cm2. 2. The normal operating pressure at the uppermost stage is: 13.0–14.5 kg/cm2 (according to the curve, the highest pressure ever reached was 15.95 kg/cm2). Safety valves are also installed on its export pipeline, with a set pressure of 18 kg/cm2.
What kind of standard is the TSG standard?
This post was last edited by zhouhuahui on 2015-7-29 09:38. I see; in fact, this system is equipped with pressure control mechanisms as well as safety valves both upstream and downstream, so the safety measures are quite comprehensive. But the key issue is that the design pressure of your system is too low, at only 15 kg/cm2, or the setting pressure of the safety valve in your unit is too high, at 18 kg/cm2. The safety valve can never activate, because by the time the pressure reaches 15 kg/cm2, the equipment has already been damaged due to overpressure; it’s impossible for it to serve as a protection mechanism for the equipment. There are two options. First: increase the design pressure of the entire system to 18 kg/cm2, but that’s no longer possible as the equipment has already been finalized ； Second: The setting pressure of the safety valve should be changed to 15 kg/cm2, which requires a higher level of skill in operation.